[Perf] Windows/x86: 2 Improvements on 2/25/2026 3:51:27 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [1ece45f85e2cb1e4c3f07f0d8eb853e546ef0ae5](https://github.com/dotnet/runtime/commit/1ece45f85e2cb1e4c3f07f0d8eb853e546ef0ae5)
Compare | [40f1da5b33c54b0fb8d76bca08f88c9874c57061](https://github.com/dotnet/runtime/commit/40f1da5b33c54b0fb8d76bca08f88c9874c57061)
Diff | [Diff](https://github.com/dotnet/runtime/compare/1ece45f85e2cb1e4c3f07f0d8eb853e546ef0ae5...40f1da5b33c54b0fb8d76bca08f88c9874c57061)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Text.RegularExpressions.Tests.Perf_Regex_Industry_Leipzig

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|

• [Count - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

| 9.75 ms | 3.74 ms | 0.38 | 0.02 | False | | |

[Test Report]()

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Text.RegularExpressions.Tests.Perf_Regex_Industry_Leipzig*'
```

### System.Text.RegularExpressions.Tests.Perf_Regex_Industry_Leipzig.Count(Pattern: "Tom.{10,25}river|river.{10,25}Tom", Options: NonBacktracking)

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

---

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [ae967feaba47c945884fb6ce232621e8616864f8](https://github.com/dotnet/runtime/commit/ae967feaba47c945884fb6ce232621e8616864f8)
Compare | [40f1da5b33c54b0fb8d76bca08f88c9874c57061](https://github.com/dotnet/runtime/commit/40f1da5b33c54b0fb8d76bca08f88c9874c57061)
Diff | [Diff](https://github.com/dotnet/runtime/compare/ae967feaba47c945884fb6ce232621e8616864f8...40f1da5b33c54b0fb8d76bca08f88c9874c57061)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in BenchmarksGame.RegexRedux_1

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|

• [RunBench - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

| 38.42 ms | 22.80 ms | 0.59 | 0.01 | False | | |

[Test Report]()

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'BenchmarksGame.RegexRedux_1*'
```

### BenchmarksGame.RegexRedux_1.RunBench

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)